Categorias: Todos - protists - algae - parasites

por Liz P 5 anos atrás

236

Supergroups used for Protists

Protists are a diverse group of eukaryotic organisms not classified as animals, plants, or fungi. They thrive in aquatic and moist environments, playing various ecological roles such as parasites, producers, and symbionts.

Supergroups used for Protists

Protists (anything not animal, plant, fungi)

roles:

parasites
phytophthora ramorum causes sudden oak death
symbionts
termites digest wood bc. of protists
producers
primary in aquatic systems

found in aquatic and moist environments

Amoebas - pseudopods

membrane-enclosed alveoli

Mixotrophs

Cell Type

Multi-Celled

Single-Celled

Colony

Examples

hairy and smooth flagellum

chemohetero, photoauto, mixo

Photosynthetic

crystalline, spiral rods on flagella

mouth grooves

unique cytoskeleton

mitochondria

Common Ancestor Eukarya

Unikonta - chemoheterotrophic

Amoebazoans
Entamoebas

Ex: entamoeba histolytica

third leading cause of death

found in untreated water

parasitic

Tubulinds
Slime molds

Cellular

move towards food

form aggregate colonies when facing starvation

Plasmodial

extend over its food

consume via phagocytosis

many diploid nuclei

Opithokonts
Nuclearids
Fungi
Choanoflagellates
Animals

Archaeoplastida

Plants
descended from green algae
Charophytes
Chlorophytes
symbionts in lichens
prefer environments with intense/ultraviolet radiation
found in freshwater
Ex: Volvox
Ex: Ulva
Red Algae
most abundant in tropic coasts
Ex: seaweeds

Dulse

Nori = sushi

contain phycoerythrin

SAR Clade

Rhizarians
Radiolarians

symmetrical cytoskeleton = silica

pseudopods "radiate" from them

used for phagocytosis

Cercozoans

parasites and predators

most heterotrophic

Foramineferans

porous, multichambered shells = tests

composed calcium carbonate

found in fossil record

Alveolates
Ciliates

contain haploid micro and macro nuclei

undergo conjugation and binary fission

move towards food w/cilia

Ex: Paramecium

Apicomplexa

Ex: (genus) Plasmodium

need humans and mosquitos

malaria

parasites to animals

most need two hosts to complete life cycle

spread with spores in host

Dinoflagellates

two flagella

cause red tide (toxic for species)

cell wall = cellulose plates

Strametoplies
Brown Algae

Structure

blades (leaf-like)

stipe (stem-like)

holdfast

Ex: seaweed

Golden Algae

Unique pigments

carotenoids

Diatoms

Ex: phytoplankton

silica cell wall

diatomaceous earth = fossils

Excavata

Euglenozoans
Euglinids

Ex: euglenia

pocket w/ 1+ flagella

Kinetoplastids

Ex: tryptosoma

Chaga's disease

sleeping sickness

DNA clump - kinetoplasts

Parabasilids
Ex: trichomonas vaginalis
hydrogenosomes
Diplomonads
Ex: Giardia intestinalis
multiple flagella
two nuclei
mitosomes